thumb|right|300px|Overview of the cryosphere and its larger components The cryosphere is an umbrella term for those portions of Earth's surface where water is in solid form. This includes sea ice, ice
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4575659b2e4d032b736b5187dde42689c957d04d8af5087ee4173b54bbb3b4e8. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46f77ab5-f9a8-4eb6-8045-4e1d5fc094a2.json and https://artists.proofprofile.net/proofs/artist/46f77ab5-f9a8-4eb6-8045-4e1d5fc094a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).